Name
Date
Molar Conversions
***FOR ALL CALCULATIONS, SHOW YOUR WORK AND INCLUDE UNITS & SIG FIGS***
PART A – MOLAR MASS
1. Calculate the molar mass for each of the following compounds. Include units!
calcium nitrate
Formula:
Molar mass:
Iron (III) Fluoride
Formula:
Molar mass:
Silver Nitrate
Formula:
Molar mass:
Formula:
Molar mass:
calcium nitrate
Formula:
Molar mass:
Molar mass:
Copper (II)
phosphate
lead(II) iodide
Dinitrogen
hexaiodide
Formula:
Molar mass:
Formula:
Uranium (VI)
hydroxide
Formula:
Molar mass:
1
PART B – MOLAR CONVERSIONS (Show your work and include units!)
2. How many moles of ammonia are in 1.20  1025 molecules of ammonia?
Formula:
Molar mass:
Answer:
3. How many formula units of Sodium sulfate are there in 250 g of Sodium sulfate?
Formula:
Molar mass:
Answer:
4. You need 2.5 g of aluminum for an experiment. How many atoms of aluminum is this?
Formula:
Molar mass:
Answer:
5. 380 g of sucrose (C12H22O11) are required to make 2 quarts of Kool-Aid. How many molecules
of sucrose are used in this recipe?
Formula:
Molar mass:
Answer:
2
6. There are 3.20  1022 atoms of copper in the outer shell of pennies. How many grams of copper
is this?
Formula:
Molar mass:
Answer:
7. If you pump 40.88 kg of octane (C8H18) into your gas tank, how many molecules of octane are
you pumping?
Formula:
Molar mass:
Answer:
8. How many hydrogen ions are there in 6.23 g of sulfuric acid?
Formula:
Molar mass:
Answer:
9. How many grams are there in 2.3 x 1024 atoms of gold?
Formula:
Molar mass:
Answer:
3